Cambridge International Mathematics

Lines, angles and polygons (Chapter 4) 109

Review set 4B

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1 State the values of the unknowns in each figure, giving a brief reason for each answer:

abc

de

2 Find the value of the unknown in each figure, giving a brief reason for your answer:

abc

3 Find the values ofxandy, giving

brief reasons for your answers:

4 Classify each triangle in as much detail as possible:

abc

5 Find the values of the unknowns:

ab

a°^107 °b°b°

c° 56°

a°

69°

62°

x°

x° x°

b°

a°

110°

()x¡+¡15° (4x¡-¡35)°

60°

3cmx

3cm

x°

y°

42°

110°

50°

50°

40°

3°x

x° x°

2°xx°

112° 124°

c° 46°

b°

a°

IGCSE01

cyan magenta yellow black

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100 100
(^05255075950525507595)
100 100
Y:\HAESE\IGCSE01\IG01_04\109IGCSE01_04.CDR Friday, 12 September 2008 4:49:47 PM PETER